From 7c0d26150781cbd8a522259c9dea9e7ef23df8e3 Mon Sep 17 00:00:00 2001
From: Michal Simek <monstr@monstr.eu>
Date: Thu, 22 Dec 2011 12:33:24 +0100
Subject: [PATCH] microblaze: Fix mapin_ram function
Fix how many pages are allocated in mapin_ram. It is lowmem_size
not setup CONFIG_LOWMEM_SIZE because it is the same for all systems.
Which means that wrong pages are allocated if memory size is smaller
than CONFIG_LOWMEM_SIZE. It has dramatic impact on bootup time.
On sp605 MMU full hw design is 7s.
Signed-off-by: Michal Simek <monstr@monstr.eu>
---
arch/microblaze/include/asm/page.h | 1 +
arch/microblaze/mm/pgtable.c | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h
index 665f29330ce1..352cc2352bd5 100644
--- a/arch/microblaze/include/asm/page.h
+++ b/arch/microblaze/include/asm/page.h
@@ -136,6 +136,7 @@ extern unsigned long max_pfn;
extern unsigned long memory_start;
extern unsigned long memory_size;
+extern unsigned long lowmem_size;
extern int page_is_ram(unsigned long pfn);
diff --git a/arch/microblaze/mm/pgtable.c b/arch/microblaze/mm/pgtable.c
index 84905da83cb7..d1c06d07fed8 100644
--- a/arch/microblaze/mm/pgtable.c
+++ b/arch/microblaze/mm/pgtable.c
@@ -167,7 +167,7 @@ void __init mapin_ram(void)
v = CONFIG_KERNEL_START;
p = memory_start;
- for (s = 0; s < CONFIG_LOWMEM_SIZE; s += PAGE_SIZE) {
+ for (s = 0; s < lowmem_size; s += PAGE_SIZE) {
f = _PAGE_PRESENT | _PAGE_ACCESSED |
_PAGE_SHARED | _PAGE_HWEXEC;
if ((char *) v < _stext || (char *) v >= _etext)